5.60 Knowing that beam AB is in equilibrium under the loading shown, draw the shear and bending-moment diagrams and determine the maximum normal stress due to bending. 400 kN/m A C -0.3m-0.4 -0.3 m 0.4 m Fig. P5.60 D B I -0.3 -0.3 m 100 W200 X 22.5